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At University of Vermont, substance-free dorms come with yoga, violins and Peloton bikes

You know it's not your average college dorm when violins can be found on every floor, but alcohol and pot are nowhere to be seen.

Psychiatry professor Jim Hudziak pulled a few strings to fill one of the freshman dorms with 80 violins and required students to sign a contract promising no drinking or drugs if they want to live there. It's a bold experiment on any college campus, but he did it at the University of Vermont, long known as a big-time party school.

"We didn't go do it in a place where everyone would say, 'oh, well, that would work.' We did it in the place where people giggled," Hudziak said.

According to the National Institute on Alcohol Abuse and Alcoholism, about a quarter of today's college students admit they suffer consequences from drinking too much. Nearly 700,000 said they've been assaulted by another student who had too much alcohol.

For students not interested in an "Animal House" experience, welcome to the "wellness environment." At this program for incoming freshmen, it's goodbye toga – hello yoga. Late-night pizza and round-the-clock partying have been replaced by Peloton bikes and personal trainers. The idea: surround college students with activities that expand the brain, not zap it with the usual menu of college indulgences.

"I remember even learning that you're supposed to eat probiotic yogurt to help your brain function," student Azilee Curl told CBS News correspondent Jim Axelrod. "Dr. Hudziak will reinforce that again and again."

It seems to be working. Binge drinking is down and GPAs and graduation rates are up. The program has grown tenfold in just four years and now includes almost a third of this year's entering class.